Electric switch.



E. S. HUF?.

ELECTRIC SWITCH.

APPucATmN man Nov. r4. 1914.

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ELECTRIC SWITCH.

APPLICATION FILED Nov. I4, 191g.

Patented Feb. 13, 1917.

2 SHEETS-SHEET 2.

EDWARD S. HUFF, 0F DETROIT, MICHIGAN, 11S-SIGNOR TO THE SIMMS MAGNET() COMP, OF EAST ORANGE, NEW JERSEY, A CORPORATION OF NEW YORK.

ELECTRIC SWITCH.

Specification or Letters Iatent.

Patented Feb. 113, 1917.'

Application led November 14, 1914. Serial No. 872,096.

land the object of my improvements is to provide an improved construction for such a device which may be easily assembled and operated and in which the connection shall be good and not liable to deterioration.

accomplish this object in the device illustrated in the accompanying drawings in which,

Figure 1, is a plan v iew of an apparatus embodying ny invention, the cover being removed from the casing.

Fig. 2, is an elevation of the same, the casing and some of the parts being shown in central longitudinal section.

Fig. 3, is a section on the line D-D Fig.

1, looking from the right of said figure.

Fig. 4, is a plan view of the parts of the switch removed from the casing and to a somewhat enlarged scale.

Fig. 5, is a detached perspective view of the connector strip.

Fig. 6, is a perspective view v.showing the bottom and integral ends of the casing.

Fig. 7, is a perspective view of the inner end of the operating rod.

Fig. 8, is a detailview partly broken away showing one of the rocking levers and its attaching parts which are adjacent to the side of the casing when the parts are assembled.

a a is a rectangular casing or box having integral ends 10-10 and bottom 11. The edges of the bottom and ends are turned inward as indicated at 9. d d are plates se- ,cured to the inner surface of the ends 10-10,

their edges forming vertical grooves in connection with the in-turned edges of the ends. e e are lugs turned inward to a horizontal drawings, which position from the plates d l at the center of the upper edge of said plates. b b are plates adapted to fit into the grooves between the plates d d and the in-turned edges of the ends 10-10, and form the sides of the casing. c is a cover having its edges turned downward to fit over vthe ends and sides of the casing a a. f f are thumb screws passing through apertures in the cover c and engaging in screw threaded apertures in the lugs e e.

g la. z' are binding posts properly insulated and secured to one of the side pieces b and 7' m are similar binding posts insulated and secured to the other of the side plates. n o

are contact pieces constituting the inner ends of the binding posts m 7c j respectively and g 7 are similar contact pieces constituting the inner ends of the binding posts g la. v1. 12 is a strip of metal insulated from the binding post g and z' having eyes in its ends surrounding said binding posts and being `firmly secured in positions at its ends by said posts. The strip 12 also has an aperture at its center surrounding the shank of the binding post h.. The head of the binding post z, bears against the surface of said strip and is in electrical Contact therewith 'and secures it firmly in position at its center. There is another strip 12 entirely similar to that just described located at the opposite side of the casing a and secured in position. as described by the binding posts 7' Z: m. The binding posts 71, and f1.: have the inner surface of their inner ends formed in the arc of a circle as shown and for the purpose hereinafter described.

u and 'v are rocking contact levers, one of said levers is located upon each side of the casing a, the adjustment being entirely similar'in both levers. The rocking lever 'v or u is composed of strips bent in the form shown and having its ends turned inward and shaped to contact, with the edges of its constituent strips, the surfaces of the inner ends of the binding posts j m or g z'.

The constituent strips of, said rocking lever are constructed and arranged as follows:

The inner strip fw is secured to form part of the lever at one end then bends outward and a in sidewise inthe part 'w' and passes aroun the shank of the binding post fm, and is secured in position by said binding post in electrical contact with the plate'12.

:v is an entirely similar and similarly located strip secured at the other end of the rocking lever v and extendin in' a part wf which passes around the shan of and is secured in place by the binding post j.

The next stri of metal constituting the rocking lever is ent at its center to form the loop, or rocker, e which lies over and normally contiguous with the parts L02 and pressing said parts against the contact piece o, which has a convex form to constitute a coacting surface.

By this construction the rocking levers are placed in good electrical contact with the center binding posts h and lc respectively and are insulated from the other binding posts except when rocked togform contact with such other posts at the ends of saidl levers.

The inner surfaces of concave as shown.

4, is a rod adapted to reciprocate through a bushing 6 on the end of the casing a. 2, is a shoe or socket secured to and forming the inner end of the rod 4. 3,V is a piece of insulating'material fitting into the socket 2 and extending transversely therethrough.

the levers 'v 'w are 4'The end pieces 3 are convex in shape and the length of said piece is such that it mayl move freely intermediate the ends of the rocking levers c and u but when forced to a position adjacent to the ends of said-levers shall press said levers against the adjacent contact pieces p q or t n as the case may be.

s is a conductor strip having forks 82 at its ends. This strip connects the binding posts j and t.

By pressing the rod 4 inward to the position shown in Fig. 1, the ends of the rocking levers u v contact the binding post y' g, and the posts j c and g l1, are placed in electrical connection with each other. By drawing the rpd 4to the other end of its travel, the leve `u o are rocked upon the part z and are orced in contact with the parts n t of the binding posts z' m and the binding posts lr; m are thus connected with k i.

In constructing my device the bindino' posts and rocking levers are first adjusted and secured in position to their respective plates b. The assembly thus secured is then adjusted to position by sliding the. ends of the plates in the groove between the inturned edges 9 and the edges of the plates d. The cover is then secured in position by the thumb screws f f.

What I claim is:

1. In an electric switch, a lever provided with a curved convex portion at one side thereof intermediate itsl ends, a surface against which said convex portion bears and against which said convex portion of. the

lever bears and upon which it is adapted to roll, and a art adapted to reciprocate longitudinal y of saidleverand bear'J against the side thereof opposite to said convex portion to cause said lever to roll upon sa1d bearing surface, said lever being so formed on the side' opposite said convex portion that said reciprocating portion shall cause-it to roll on said bearing surface. .l

3; vIn a switch, a lever formed of strips of conducting material, one of said strips being bent at its center to form a rocker for the purpose described, means for rocking said lever upon said rocker, and means for making dilierent contacts according to the angular position of said lever.

4. In an electric switch, a lever formed of strips, one of said strips being shaped at its center to form a rocker for said lever and another of said strips being bent outward and extending past and adjacent to said rocker, said strip being secured at its outer end to secure said lever in place.

5. In an electric switch, a rocklng lever,

a strip of resilient material secured at one end to said lever' and extending outward therefrom, and means for securing the outer end of said strip to attach said lever.

6. In an electric switch, a 'rocking lever, a strip secured at one end toward one end of said lever and extending outwardutherefrom and toward the other end of said lever, a second strip secured to the other end of said lever extending outward and toward the first named end of said lever, the outer ends of said levers being attached and securing said lever in place.

7. In an electric switch, a rocking lever, a strip secured lat one end toward one end of said lever and extending outward therev. from and toward the other end of said lever,

pivoted-to the inner face of said side plate' at its center,l arod passing through one end of said casing and adapted to reciprocate therein inthe plane of oscillation of saidA lever, said rod contacting said lever and to said lever and holding said convex 'part adapted to slide along the concave surface against said surface.

10 thereof for the purpose described. i In testimony whereof, I sign this Specifi- 9. In an electric switch, a lever having a cation in the presence of two witnesses. curved convex portion extending from one EDWARD S. HUFF.

side thereof, a surface against which said Witnesses: convex portion bears and upon which it is v AGNES M. HIPKINS,

adapted to roll, and a flexible part connected ELLIo'i'r J. STODDARD. 

